作　　者： ; ; ; ; ; ;

机构地区： 中国科学院广州地球化学研究所有机地球化学国家重点实验室

出　　处： 《环境科学》 2008年第8期2105-2110,共6页

摘　　要： 分别在典型电子垃圾拆解区（E）和其上风向参考点（S）采集了大气颗粒相和气相样品,以研究该区域大气中PBDEs的浓度水平、污染特征和气/固分布特点.分析过程中运用气相色谱-质谱联用仪,负化学离子源（GC-NCI-MS）检测了11种PBDEs.结果表明,电子垃圾拆解造成了比较严重的PBDEs污染,三溴-十溴联苯醚的浓度范围为51.1-2 685 pg·m^-3（平均值830pg·m^-3）,而对照区由于制衣行业的影响也造成了一定程度的PBDEs污染,三溴-十溴联苯醚的浓度范围为1.00-98.9pg·m^-3（平均值28.7 pg·m^-3）.在气/固分布的研究中发现,不同的PBDEs在气相和颗粒相的分布比例相差很大,从低溴至高溴PBDEs在气相中的比例呈降低趋势,而在颗粒相中的比例呈上升趋势.电子垃圾拆解区以五溴-联苯醚污染为主,占∑11PBDEs总量的54.3%;而十溴-联苯醚污染次之,占∑11PBDEs总量的23.8%,该污染特征进一步证实了该地区电子垃圾的来源,不仅来自亚洲国家,而且还来自欧美等国家. The vapor-phase and particulate-phase samples were collected from the Ewaste dismantling region（E） and a reference region（S）,which is located in the upwind direction of the E and where the costume industry is developed.The aim was to acquire information about the concentrations,gas/particle partitioning and distribution of polybrominated diphenyt ethers（PBDEs）.11 congeners PBDEs were detected with GC-NCI-MS.The results showed that E-waste dismantling has resulted in serious pollution and the PBDE concentrations（from tri-to deca-BDE） ranged from 51.1pg·m^-3 to（2685）pg·m^-3（mean：830pg·m^-3）,while the PBDE concentrations（from tri-to deca-BDE） in S were in the range of 1.00pg·m^-3 to 98.9pg·m^-3（mean： 28.7pg·m^-3）.The gas/particle partitioning of PBDEs exhibited a strong dependence on bromine number.Low-brominated PBDEs tend to have a higher concentration in the gas-phase while highly brominated PBDEs are mostly associated with the particulate.The mass distribution of PBDEs in E（including vapor-phase and particulate-phase） was dominated by penta-BDE,accounting for 54.3% of the total PBDEs,followed by deca-BDE,accounting for 23.8%.This pollution characters validated that the E-waste did not only come from Asia,but also from North America and Europe.

关 键 词： 电子垃圾 大气污染 气 固分配

领　　域： [环境科学与工程]